@gregoa_ I hear you. I have also generally upgraded my Pis in-place despite the warnings against it, but it seems the warnings were particularly strident this time. I don't follow testing, but I know the stable releases lag significantly. Debian Bookworm came out on June 10, and RPi Bookworm took 4 more months. It's pretty annoying having all my other systems on bookworm, having to deal with bullseye differences for months, and then warnings not to upgrade after that.